Threader for paper-drying machines



May 22, 1928. I 1,670,873

L. M. AVENSON THREADER FOR PAPER DRYING MACHINES Original Filed May 17,1926 Fig.5

Lorefizo Mikven son W e ethane/95 Patented May 22, 1928.

UNITED STATES:

LORENZO I. AVENSCN, ST. PAUL, MINNESOTA.

THREADED FOB PAPER-DRYING MAQHINES.

Application filed my 17, 1926, Serial My invention relates toimprovements in threaders for paper drying machines, an object of theinvention being to provide a continuous tape passing successively aroundthe various drier rolls of a drier and adapted to thread a paper webaround said rolls in starting the machine, or when theWveb for anyreason becomes broken.

Another object of the invention resides in providing a device forshifting the tape along the drier rolls to guide said tape to one sideof the web, running over said rolls, so as to permit said web to travelthrough the rolls free from said tape.

key slots at frequent intervals along said tape, and in providing aleader having a head adapted to be inserted into any one of said slotsand detachably held therein, said leader having attached to it aflexible sling to receive the leading end of a web and lead said webalong with the tape, as said tape passes over the rolls of the drier. v

With the foregoing and other objects in view, which will appear in thefollowing description, the invention resides in the novel combinationand arrangement of parts and in the details of construction hereinafterdescribed and claimed. In the drawings: Fig. 1 is a diagrammatical sideelevational view of a drying machine illustrating an embodiment of myinvention applied thereto. M

. Fig. 2 is a perspective view drawn to an enlarged scale, said viewillustrating a portion of the receiving roll of the drying ma chine andaportion .of the tape passingthereover, also illustrating the method ofattaching the leading end of a paper web to said tape. p Fig. 3 is aside elevational view illustrating an auxiliar roll over which the beltpasses, also mec anism for shiftin the belt along this roll and alongthe ro ls of the drier.

Fig. 4 is a plan view of the structure shown in Fig. 3.

Fig. 5 is an enlarged longitudinal sectional view of the'lea'der securedto the tape.

It has been customary in the drying of;

paper with the 'usual drying machines to employ several men for the solepurpose of A still further object resides in providing in. 109,547.Renewed April so, 1927.

threading the paper web around the drier rolls whenever the machine wasstarted or the web became broken. This practice has ;continued in spiteof several attempts to employ threading devices for automaticallythreading the web about the rolls, the principal objection to'saidthreading devices being that the paper web either had to come in contactwith the threading tape at all times, or had to be shifted laterally inthe machine in order to be engaged by the threading device. My inventionprovides an effective and positive device including an endless tape forautomatically feeding and threading a web about the drier rolls of adrier, which tape may be shifted to one side of the path of the paperweb, so as to allow said web to travel-freely along the drier rolls, andwhich may be readily shifted back into the path of the web whenever itbecomes desirable to attach the web to said tape.

For the purpose of illustrating the application of my invention, I haveshown di agrammatically in Fig. 1 a paper drying machine indicated inits entirety at A. This machine consists of a plurality of tiers 10 ofdrier rolls 11 arranged in alternateand staggered relation'andjournalled for rota tion upon uprights 12. -Although I have shown buttwo such tiers of rolls in the drawing, it can readily be understoodthat paper machines employing any number, of said tiers of rolls may bee ually well equipped with my invention. onstructed in the usual manner,each. drier roll 11 includes a cylindrical shell 45 and heads 46 securedto the ends of said shell by bolts 47. These drier rolls 11 are carriedon shafts 48, journalled onthe uprights 12, and are provided with means(not shown) for steamheating the same. The various rolls 11 are drivenin the usual manner by gears not illustrated, which rolls carry thepaper web and cause the same to travel rom the receiving end to thedelivery end of the machine. In additiorf to the above, 1

such other construction may be employed as becomes essential to thesuccessful operation of the drying machine, whiclrconst-ruction,however, forms no particular feature of the invention, and has not beenshown in detail in this drawing.

For the purpose of my invention, one end of each of the drier rolls 11is formed with a flange which may be constructed integral therewith, orwhich may be attached thereto in any suitable manner. When the flange isto be applied to the ordinary drier rolls, the construction shown inFig. 2 may be used. For this purpose I employ a separate flange 49 whichhas issuing from it a sleevelike portion 50 of the same outside diameteras the shell 45, which sleeve-like portion fits up against the head 46to provide a flanged extension to the roll proper, indicated in itsentirety at 51. This sleeve-like portion is formed with a number ofinwardly extending lugs 52 adapted to become seated upon the head 46.and through which a corresponding number of bolts 47 may pass. In thismanner .said extension 51 may be rigidly bolted to the ends of the rolls11. Around the various rolls 11 is threaded a relatively thin andnarrowsteel tape 16, which is provided at regular intervals throughoutits length with (key) slots 17, each enlarged at one end, as at 18, andreduced at its other end, as at 19. This tape passes successively aroundthe rolls 11, as shown in Fig. 1, and

'is held taut by occasional tape tighteners 14 of suitable constructionarranged on the uprights 12. Prior to passing over the receiving roll 20of the paper drier, the tape 16 is caused to pass beneath two idlers 21and 22, disposed upon the floor of the building in which the drier issituated. These idlers carry said tape from the last roll 23 of thedrier to the forward portion of the machine. At this position, said tapefurther passes over an auxiliary roll 24, journalled in standards 25 and26 seated upon the floor, which roll 24 causes the upper reach 27 ofsaid belt to incline upwardly toward the receiving roll 20 in a properangular relation thereto, to enable the paper web coming from thepressrolls to the drying machine to be conveniently attached to the tapeand carried thereby, as will presently become apparent.

The tape 16 may be shifted transversely along the rolls 11 so as tocause the same to travel in proximity to flanges 49 of said rolls, whereit is out of the way of the paper 1 web, or the same may be shiftedinwardly to ride on zones of said rolls normally occupied by a margin ofthe paper web, so as to permit of readily attaching the leadin end of aweb to said'tape, and cause sai web to be threaded and fed around thevarious drier rolls of the drying machine. For accomplishing thispurpose, I I provide a threaded spindle 28 journalled for rotation inbearings 29 formed on the standards 25 and 26. This spindle carries ashifter fork 30, which slides upon a guide bar 31, the shifter fork beinthreaded to screw upon the threaded spin le '28 and arranged'to en- ,to,said tape 16 may be laterally shifted along the rolls 11 to travel anydesired distance from the ends thereof, within the limits of the spindle28 and roll 24.

For attaching the leading end of a paper web to the tape 16, I employ aleader 33 best illustrated in Figs. 2 and 5. This leader includes anattaching member 34 constructed of a strip of resilient sheet materialsubstan; tially the same width as the tape 16. This attaching member isprovided at one end with a headed stud 35 adapted to be inserted intothe enlarged end 18 of any of theslots l7, and upon movement in adirection oppo site to the travel of said tape 16 to become lodged inthe narrowed portion 19 of the selected slot, and so rigidly held inplace upon the tape 16. The other end of the attaching member 34 isformed with an eye 36 in which is inserted a sling 37 constructed ofwebbing or any other suitable flexible material, such as a rubberizedfabric or a leather strap.

In using the invention the following procedure is adopted. The tape 16under normal conditions, travels upon the roll extensions 51 in closeproximity to the flanges 49 thereof. Whenever the paper web breaks or itbecomes necessary to thread the same around the various drier rolls 11of the drying machine A, the tape 16 is shifted inwardly on the rotatingrolls 11' by means of the crank 32 until said tape reaches a position onsaid rolls normally ridden by the nearest marginal portion of the web.The leading end 38 of the paper web 39, a portion of which has beenshown in Fig. 2, is crumpled and inserted through the sling 37 and theheaded stud 35 of the leader 33 hooked into the nearest slot 17 in thetape 16. As the tape travels along, the paper web 39 is led by it andthereby automatically threaded over and around the successive rolls 11until the leading end of the web arrives at the discharge end of themachine. Here, the web is detached from the leader 33 and said leaderdisengaged from the tape, the dried web passing on to cutters or othermachinery employed. It will be noted that the tape 16 can be so shiftedas to cause the paper web upon entering the drier to take exactly thesame position as it would ordinarily take when traveling through themachine in its normal course. As soon as the leading end 38 of the webis well started along the rolls 11, the tape 16 may be moved laterallyof said rolls 11 by means of the crank 32 and spindle 28, toward theflanges '49 to shift said tape to one side of the paper web. As soon asthe tape reaches the flanges 49 it travels freely about the sleeve-likep0rtions'50 of the roll extensions 51 without interference with thepaper web, being at all times available for the purpose of threading thedrier, as herethrough the machine, being of relatively thin material,permits, in some instances, of the tape remaining in feeding position onthe rolls 11 of the machine. When the tape is shifted onto the rollextensions 51, the paper web travels through the machine untouched bysaid tape and free from any chance of being injured or disfigured bycontact with the tape.

The invention is extremely simple and its effectiveness in useeliminates the hard and hazardous labor of the several men required forthe threading of a drier, which men, though usually idle when the drieris functioning normally, are required always to be present to thread themachine in case the paper web breaks.

Changes in the specific form of my invention, as herein disclosed, maybe made within the scope of whatis claimed without departing from thespirit of my invention.

Having described my invention, w ;t I claim as new and desire to protectby Letters Patent is 1.' In combination with the drier rolls of tachingmember, adapted to be detachably secured to said tape, and a flexiblesling secured to said attaching member for the reception of the leadingend of a paper web.

3. In combination with the drier rolls of a drying machine, a tapeextending around said rolls, means for shifting said tape laterally ofsaid rolls and means for attaching the leading end of a web to saidtape.

4. In combination with the drier rolls of a dryinkr machine, atape'extending around said rolls, an auxiliary roll positioned inadvance of the receiving roll of the drying machine, said tape passingaround said aux.-

iliary roll, means .for detachably securing the leading end of a web tosaid tape, and means adjacent the auxiliary roll for shifting the lowerreach of said tape thereto along said roll.

5. A leader for attaching the leading end of a paper web to a feedingtape, comprising'an attaching member, means formed on said attachingmember for detachably securing said member to the threading tape, andasling fastened to said attaching member for receiving the end of thepaper web.

6. A feeding and threading 'device for drying machines, comprising anendless tape adapted' to travel around the drier rolls, said tape havinga plurallty of key slots formed therein at intervals throughout slots,said attaching member bein formed with an eye therein, and a flexi lesling passed through said eye and adapted to receive the crumpled end ofa paper web. I 7. A feeding and threading device'comprising an endlesstapeadapted to run over the web drying rolls of a paper drying machine,means for moving said tape laterally of said rolls into and out of thepath of travel of a paper web thereon, and means for attaching theleading end of a paper web to said tape.

8. In combination with the drierrolls of a paper drying machine, atapeextending around said rolls, a mounting situated in advance of thereceiving roll of the drying machine, an auxiliary roll journalled insaid mounting, said tape passing around said auxiliary roll and to saidreceiving roll, a threaded spindle journalled in said mounting, a.shifter fork carried by said spindle and movable along the same uponrotation thereof, and means for attaching. the leading end of a paperweb to said tape.

9. In combination with the drier rolls of a paper drying machine, a tapeextending around said rolls, roll extensions at the ends of,t-he rollsof the same diameter as said roll, and means for shifting the tapefronrthe rolls to said extensions.

10. In combination with [the drier rolls of a paper drying machine, ametallic tape extending around said rolls and formed with key slots atintervals therein, a leader adapted to receive and hold the end of apaper web, said leader including a resilient attaching member formedwith a head thereon for swiveling engagement, selectively, with each ofsaidkey slots.

11. -The method of threading a paper web to the rolls of a dryingmachine having a feeding tape running over said rolls, said methodconsisting in shifting the tape laterally on the rolls into the paththereon normally traveled by paper webs, then attaching the leading endof a web to said tape, and finally moving said tape out of said path atonepoint to cause the disposition of said tape atall points thereof outof said path.

12. The combination with the drier rolls of a drying machine, an endlesstape extending around said rolls and shiftable lateraL- of a dryingmachine, a tape extending around said rolls and formed in a plurality ofplaces uniformly spaced lengthwise. of of a drying 'machine, a tapeextending said tape to permit of the attachment there- 'around saidrolls and formed at intervals to of the leading endof a web, andtightento permit of the non-slipping attachment 10 ing devicesco-operating with the tape, said liwl'vto of the leading end of a web.

5 tape being adapted to pass smoothly Over. .In testimony whereof, Ihave signed m vsaid devices. name to this specification.

In combination with the drier rolls v LORENZO M. AVEN'SON.

